Chances for SUSY-GUT in the LHC Epoch

• Published in: The journal of high energy physics Vol. 2015; no. 8; pp. 1 - 29
• Main Authors: Berezhiani, Zurab, Chianese, Marco, Miele, Gennaro, Morisi, Stefano
• Format: Journal Article
• Language: English
• Published: Berlin/Heidelberg Springer Berlin Heidelberg 01-08-2015; Springer Nature B.V
• Subjects: Classical and Quantum Gravitation; Coupling; Elementary Particles; High energy physics; Joining; Large Hadron Collider; Mathematical models; Particle accelerators; Physics; Physics and Astronomy; Quantum Field Theories; Quantum Field Theory; Quantum Physics; Regular Article - Theoretical Physics; Relativity Theory; Standard model (particle physics); String Theory; Supersymmetry; Upper bounds; Supersymmetry Phenomenology
• ISSN: 1029-8479; 1029-8479
• DOI: 10.1007/JHEP08(2015)083

A
bstract
The magic couple of SUSY and GUT still appears the most elegant and predictive physics concept beyond the Standard Model. Since up to now LHC found no evidence for supersymmetric particles it becomes of particular relevance to determine an upper bound of the energy scale they have to show up. In particular, we have analyzed a generic SUSY-GUT model assuming one step unification like in SU(5), and adopting
naturalness
principles, we have obtained general bounds on the mass spectrum of SUSY particles. We claim that if a SUSY gauge coupling unification takes place, the lightest gluino or Higgsino cannot have a mass larger than ∼ 20 TeV. Such a limit is of interest for planning new accelerator machines.